- using std::string; - using std::wstring; - using std::ostream; - using std::istream; - using std::iostream; - using std::ostrstream; - using std::istrstream; - using std::fstream;
this fixes commit#6dca1d3a6d64f6b55d5545fd209acc0f81aab9ec in OSX, need to include cmath to use std::abs